1998 Feb 23
6
NXP Semiconductors
Product specification
3 W mono BTL audio amplifier with DC
volume control
TDA7056AT
CHARACTERISTICS
V
P
= 12 V; V
DC
= 1.4 V; f = 1 kHz; R
L
= 16
Ω
; T
amb
= 25
°
C; unless otherwise specified (see Fig.14).
Notes
1. With a load connected to the outputs the quiescent current will increase, the maximum value of this increase being
equal to the DC output offset voltage divided by R
L
.
2. The noise output voltage (V
n(o)(rms)
) at f = 500 kHz, is measured with R
s
= 0
Ω
and B = 5 kHz.
3. The ripple rejection is measured with R
s
= 0
Ω
and f = 100 Hz to 10 kHz. The ripple voltage (V
ripple
= 200 mV RMS)
is applied to the positive supply rail.
4. The noise output voltage (V
n(o)(rms)
) is measured with R
s
= 5 k
Ω
unweighted.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Supply
V
P
supply voltage
4.5
−
18
V
I
q(tot)
total quiescent current
R
L
=
∞
; note 1
−
8
16
mA
Maximum gain (V
7
= 1.4 V)
P
o
output power
THD = 10%; R
L
= 16
Ω
3
3.5
−
W
THD
total harmonic distortion
P
o
= 0.5 W
−
0.3
1
%
G
v(max)
maximum total voltage gain
34.5
35.5
36.5
dB
V
i(rms)
input signal handling (RMS value)
V
VC
= 0.8 V; THD
<
1%
0.5
0.65
−
V
V
n(o)(rms)
noise output voltage (RMS value)
f = 500 kHz; note 2
−
210
−
μ
V
B
bandwidth
at
−
1 dB
−
0.02 to 300
−
kHz
SVRR
supply voltage ripple rejection
note 3
38
46
−
dB
⎪Δ
V
OS
⎪
DC output offset voltage
⎪
V
17
−
v
14
⎪
−
0
150
mV
Z
i
input impedance (pin 3)
15
20
25
k
Ω
Minimum gain (V
7
= 0.5 V)
G
v
voltage gain
−
−
44
−
dB
V
o(n)(rms)
noise output voltage (RMS value)
note 4
−
20
30
μ
V
Mute position
V
o(mute)
output voltage in mute position
V
VC
≤
0.3 V;
V
I
= 600 mV; note 4
−
35
45
μ
V
DC volume control
Δ
G
v
voltage gain control range
75
80
−
dB
I
VC
control current
V
VC
= 0 V
60
70
80
μ
A
